Do all humans have a sin-bent, anti-God personality from birth?
Yes. Every person, as a descendant of Adam, is born with a body that houses a personality which is sin-bent and anti-God. This universal condition exists from birth, and Scripture describes all people this way apart from God's grace, so no one is exempt by nature.
Les teaches that every human, as a son of Adam, is born with a body in which dwells a personality that is sin-bent and anti-God. He explains that this mind, will, and emotion was created in Adam directly by the Creator, so it is an eternal, created thing from God that will live somewhere forever. Because of this universal condition, no one is naturally good enough to escape it. Les points to Romans 3 and Romans 8 to show what Scripture calls us, rejecting the idea that people are basically good or that the wicked will be annihilated.